US4011001A - Liquid crystal device - Google Patents
Liquid crystal device Download PDFInfo
- Publication number
- US4011001A US4011001A US05/558,461 US55846175A US4011001A US 4011001 A US4011001 A US 4011001A US 55846175 A US55846175 A US 55846175A US 4011001 A US4011001 A US 4011001A
- Authority
- US
- United States
- Prior art keywords
- liquid crystal
- base plate
- crystal device
- light source
- crystal element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0023—Visual time or date indication means by light valves in general
- G04G9/0029—Details
- G04G9/0035—Details constructional
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13743—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on electrohydrodynamic instabilities or domain formation in liquid crystals
- G02F1/1375—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on electrohydrodynamic instabilities or domain formation in liquid crystals using dynamic scattering
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
Definitions
- This invention relates to a liquid crystal device which incorporates its own light source.
- said device depends upon ambient or natural light in order to illuminate the liquid crystal element and such is disadvantageous in that the display cannot be easily seen in a dark place.
- the light source for lighting the liquid crystal should be of low power consumption according to the low power consumption of the liquid crystal device. Therefore, it is desirable that the light source be located as near as possible to the liquid crystal panel in order to illuminate said liquid panel by the light source of the low intensity.
- the present invention aims at eliminating the above noted difficulty and insufficiency, and therefore it is the primary object of the present invention to provide a liquid crystal device which has a light source for lighting said liquid crystal panel.
- Another object of the present invention is to provide the liquid crystal device of a thin type which has the light source positioned in a recess portion of said liquid crystal panel.
- a liquid crystal device comprises a liquid crystal element contained in a cavity formed between a pair of circular transparent base plates, one or more recess portions formed at the side edge of said base plates, and a light source mounted within the recess portion whereby the display face of said liquid crystal device is illuminated by said light source.
- FIG. 1 is a rear or back view of the liquid crystal device according to the present invention.
- FIG. 2 is a cross sectional view taken along the line 2--2 of FIG. 1;
- FIG. 3 is a cross sectional view of another embodiment of said liquid crystal device of the present invention.
- FIG. 1 and FIG. 2 show the liquid crystal device of the FE (Field Effect) type.
- the device comprises a first base plate 1 having a circular plate shape and having on the backside thereof an electrode 2 formed by a transparent conductive membrane.
- the electrode 2 has an array of electrode terminals 2a and 2b ... which extend radially outwardly to the outer peripheral surface of said first base plate 1.
- a polarization plate 3 is mounted on the front or viewing surface of said first base plate 1.
- An annular spacer 4 defines a cavity which contains the liquid crystal element 5 between said first base plate 1 and a transparent back electrode 6.
- a second base plate 7 having a transparent circular shape is sandwiched between the back electrode 6 and a polarization plate 9 means defining cut-out a portion or recess 8 is formed at a side edge of the second base plate 7 by cutting at least one or more portions from the outer side portion of the base plate 7.
- a reflective plate 10 made of transparent material and having the same shape as that of said second base plate 7 is attached to the backside of the polarization plate 9.
- the plate 10 has an irregular reflective face 10a which of grazed glass shaped to the front of display side of said reflective plate 10, and a mirrored reflective face 10b shaped to the backside of said reflective plate 10.
- a light source 11 for lighting the liquid crystal element 5 is positioned within said cut-out portion 8 at the side edge of said second base plate 7 and said reflective plate 10.
- a connector terminal 12 makes electrical connection between the electrode terminals 2a and 2b and the other electrode.
- FIG. 3 shows another embodiment of liquid crystal device of the "DSM" type and the same numerals as used in FIG. 2 are used in FIG. 3 to denote the same parts.
- a reflective face 7a which has an irregular or rough surface portion is formed on the back face of the base plate 7 or there is no polarization plate 9 reflective plate 10.
- the light from said light source 11 positioned within said recess portion 8 is reflected by said reflective face 10b of said reflective plate 10, and then said light is irregularly or randomly reflected by said irregular reflective face 10a and directed toward said first base plate 1 or said light is directly reflected by irregular reflective face 10a whereby said light illuminates said liquid crystal panel from behind.
- the light from said light source 11 which is positioned to said cut out portion 8 is directly and irregularly reflected by said irregular reflective face 7a and illuminates said liquid crystal panel from behind.
- said first and second base plates 1 and 7 are easily manufactured with a circular shape.
- the light source is positioned to illuminate all of said display face effectively by using a light source of low power consumption. Furthermore, said light source is positioned so as not to obstruct or interfere with the connector electrode terminals 2a and 2b of said base plate 1.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electric Clocks (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JA49-29744 | 1974-03-15 | ||
JP49029744A JPS50123295A (nl) | 1974-03-15 | 1974-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4011001A true US4011001A (en) | 1977-03-08 |
Family
ID=12284597
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/558,461 Expired - Lifetime US4011001A (en) | 1974-03-15 | 1975-03-14 | Liquid crystal device |
Country Status (6)
Country | Link |
---|---|
US (1) | US4011001A (nl) |
JP (1) | JPS50123295A (nl) |
CH (1) | CH615076B5 (nl) |
DE (1) | DE2511252A1 (nl) |
FR (1) | FR2264344A1 (nl) |
GB (1) | GB1478931A (nl) |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4096550A (en) * | 1976-06-24 | 1978-06-20 | Bbc Brown Boveri & Company Limited | Illuminating arrangement for a field-effect liquid-crystal display as well as fabrication and application of the illuminating arrangement |
US4118111A (en) * | 1976-04-02 | 1978-10-03 | Ebauches S.A. | Electro-optic passive display device and method for its manufacture |
US4212048A (en) * | 1978-06-16 | 1980-07-08 | General Electric Company | Illuminator for reflective dichroic liquid crystal displays |
DE3528718A1 (de) * | 1984-08-27 | 1986-03-06 | Mitsubishi Rayon Co | Lichtstreueinrichtung |
WO1987006046A1 (en) * | 1986-03-25 | 1987-10-08 | Powercraft As | Display panel for image presentation and/or recording |
US4870484A (en) * | 1983-05-13 | 1989-09-26 | Seiko Epson Corporation | Color display device using light shutter and color filters |
US4874228A (en) * | 1987-03-24 | 1989-10-17 | Minnesota Mining And Manufacturing Company | Back-lit display |
US4976514A (en) * | 1988-08-03 | 1990-12-11 | Pioneer Electronic Corporation | Liquid crystal display device |
US5054885A (en) * | 1988-10-11 | 1991-10-08 | Minnesota Mining And Manfuacturing Company | Light fixture including a partially collimated beam of light and reflective prisms having peaks lying on a curved surface |
EP0545705A1 (en) * | 1991-12-03 | 1993-06-09 | Sharp Kabushiki Kaisha | Liquid crystal display device |
US5317430A (en) * | 1991-12-11 | 1994-05-31 | Sharp Kabushiki Kaisha | Liquid crystal display device having transparent optical conductor integral with opaque support on end surfaces with no light source |
WO1995007435A1 (en) * | 1993-09-09 | 1995-03-16 | Precision Lamp, Inc. | Flat panel display lighting system |
US5402324A (en) * | 1993-06-04 | 1995-03-28 | Enplas Corporation | Surface illuminant device |
US5440197A (en) * | 1993-10-05 | 1995-08-08 | Tir Technologies, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
US5461547A (en) * | 1993-07-20 | 1995-10-24 | Precision Lamp, Inc. | Flat panel display lighting system |
US5464490A (en) * | 1993-08-18 | 1995-11-07 | Casio Computer Co., Ltd. | Process for manufacturing liquid crystal display |
US5608550A (en) * | 1994-06-24 | 1997-03-04 | Minnesota Mining And Manufacturing Company | Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector |
US5664862A (en) * | 1994-11-29 | 1997-09-09 | Precision Lamp, Inc. | Edge light for panel display |
EP0886171A1 (fr) * | 1997-06-20 | 1998-12-23 | Koninklijke Philips Electronics N.V. | Dispositif d'affichage à cristaux liquides et appareil électronique comportant un tel dispositif. |
US5892325A (en) * | 1993-10-05 | 1999-04-06 | Teledyne Lighting And Display Products, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
US6007209A (en) * | 1997-03-19 | 1999-12-28 | Teledyne Industries, Inc. | Light source for backlighting |
US6134092A (en) * | 1998-04-08 | 2000-10-17 | Teledyne Lighting And Display Products, Inc. | Illumination device for non-emissive displays |
US6166787A (en) * | 1998-03-17 | 2000-12-26 | Motorola, Inc. | Optical display device having prismatic film for enhanced viewing |
US6229585B1 (en) * | 1997-10-21 | 2001-05-08 | Rohm Co., Ltd. | Liquid crystal display unit having light on one substrate illuminating edge of other |
US6285425B1 (en) | 1998-06-29 | 2001-09-04 | Motorola, Inc. | Ridged reflector for an optical display having a curved and a planar facet for each ridge |
US6285426B1 (en) | 1998-07-06 | 2001-09-04 | Motorola, Inc. | Ridged reflector having optically transmissive properties for an optical display device |
US6313892B2 (en) | 1993-10-05 | 2001-11-06 | Teledyne Lighting And Display Products, Inc. | Light source utilizing reflective cavity having sloped side surfaces |
US6456279B1 (en) * | 1998-07-14 | 2002-09-24 | Hitachi, Ltd. | Liquid crystal display device with a touch panel |
US6473554B1 (en) | 1996-12-12 | 2002-10-29 | Teledyne Lighting And Display Products, Inc. | Lighting apparatus having low profile |
US20030067565A1 (en) * | 2001-10-05 | 2003-04-10 | Nobuyuki Yamamura | Liquid crystal display |
US6552852B2 (en) | 2000-12-21 | 2003-04-22 | Zetetic Institute | Catoptric and catadioptric imaging systems |
US6717736B1 (en) | 2003-02-13 | 2004-04-06 | Zetetic Institute | Catoptric and catadioptric imaging systems |
US20050140835A1 (en) * | 2002-11-29 | 2005-06-30 | Fujitsu Limited | Illuminating device and liquid crystal display apparatus |
US20100097897A1 (en) * | 2002-11-04 | 2010-04-22 | Tseng-Lu Chien | Time piece with led light means |
USD735589S1 (en) * | 2012-02-28 | 2015-08-04 | Movado Llc | Watch case |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH608934B5 (de) * | 1976-06-03 | 1979-10-31 | Bbc Brown Boveri & Cie | Elektro-optische anzeigevorrichtung |
DE2827573C2 (de) * | 1978-06-23 | 1983-02-03 | Blaupunkt-Werke Gmbh, 3200 Hildesheim | Großflächige Lichtquelle |
DE3030064A1 (de) * | 1980-08-08 | 1982-03-11 | Vdo Adolf Schindling Ag, 6000 Frankfurt | Passive elektrooptische anzeigevorrichtung |
DE3343829A1 (de) * | 1983-12-03 | 1985-06-13 | Albert Ackermann GmbH & Co KG, 5270 Gummersbach | Vorrichtung zur beleuchtung einer wenigstens teilweise lichtdurchlaessigen anzeigescheibe |
JPS612685U (ja) * | 1984-06-12 | 1986-01-09 | 株式会社 ワコム | 液晶パネルデイスプレイ |
GB2269686A (en) * | 1992-07-09 | 1994-02-16 | Nat Electronics & Watch Compan | Time piece display. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3712047A (en) * | 1970-05-11 | 1973-01-23 | Manuf Des Montkes Rolex Sa Bie | Time display device for timepieces |
US3840695A (en) * | 1972-10-10 | 1974-10-08 | Westinghouse Electric Corp | Liquid crystal image display panel with integrated addressing circuitry |
US3864905A (en) * | 1973-11-14 | 1975-02-11 | Hoffmann La Roche | Horological instrument incorporating means for illuminating a liquid crystal display |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5062595A (nl) * | 1973-10-03 | 1975-05-28 |
-
1974
- 1974-03-15 JP JP49029744A patent/JPS50123295A/ja active Pending
-
1975
- 1975-03-04 GB GB8897/75A patent/GB1478931A/en not_active Expired
- 1975-03-13 FR FR7507845A patent/FR2264344A1/fr not_active Withdrawn
- 1975-03-14 US US05/558,461 patent/US4011001A/en not_active Expired - Lifetime
- 1975-03-14 DE DE19752511252 patent/DE2511252A1/de not_active Withdrawn
- 1975-03-14 CH CH330575A patent/CH615076B5/xx unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3712047A (en) * | 1970-05-11 | 1973-01-23 | Manuf Des Montkes Rolex Sa Bie | Time display device for timepieces |
US3840695A (en) * | 1972-10-10 | 1974-10-08 | Westinghouse Electric Corp | Liquid crystal image display panel with integrated addressing circuitry |
US3864905A (en) * | 1973-11-14 | 1975-02-11 | Hoffmann La Roche | Horological instrument incorporating means for illuminating a liquid crystal display |
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4118111A (en) * | 1976-04-02 | 1978-10-03 | Ebauches S.A. | Electro-optic passive display device and method for its manufacture |
US4096550A (en) * | 1976-06-24 | 1978-06-20 | Bbc Brown Boveri & Company Limited | Illuminating arrangement for a field-effect liquid-crystal display as well as fabrication and application of the illuminating arrangement |
US4212048A (en) * | 1978-06-16 | 1980-07-08 | General Electric Company | Illuminator for reflective dichroic liquid crystal displays |
USRE36792E (en) * | 1983-05-13 | 2000-07-25 | Seiko Epson Corporation | Color display device using light shutter and color filters |
US4870484A (en) * | 1983-05-13 | 1989-09-26 | Seiko Epson Corporation | Color display device using light shutter and color filters |
DE3528718A1 (de) * | 1984-08-27 | 1986-03-06 | Mitsubishi Rayon Co | Lichtstreueinrichtung |
WO1987006046A1 (en) * | 1986-03-25 | 1987-10-08 | Powercraft As | Display panel for image presentation and/or recording |
US4874228A (en) * | 1987-03-24 | 1989-10-17 | Minnesota Mining And Manufacturing Company | Back-lit display |
US4976514A (en) * | 1988-08-03 | 1990-12-11 | Pioneer Electronic Corporation | Liquid crystal display device |
US5054885A (en) * | 1988-10-11 | 1991-10-08 | Minnesota Mining And Manfuacturing Company | Light fixture including a partially collimated beam of light and reflective prisms having peaks lying on a curved surface |
US5341231A (en) * | 1991-12-03 | 1994-08-23 | Sharp Kabushiki Kaisha | Liquid crystal display device with edge lit lightguide reflecting light to back reflector by total internal reflection |
EP0545705A1 (en) * | 1991-12-03 | 1993-06-09 | Sharp Kabushiki Kaisha | Liquid crystal display device |
US5317430A (en) * | 1991-12-11 | 1994-05-31 | Sharp Kabushiki Kaisha | Liquid crystal display device having transparent optical conductor integral with opaque support on end surfaces with no light source |
US5402324A (en) * | 1993-06-04 | 1995-03-28 | Enplas Corporation | Surface illuminant device |
US5461547A (en) * | 1993-07-20 | 1995-10-24 | Precision Lamp, Inc. | Flat panel display lighting system |
US5464490A (en) * | 1993-08-18 | 1995-11-07 | Casio Computer Co., Ltd. | Process for manufacturing liquid crystal display |
WO1995007435A1 (en) * | 1993-09-09 | 1995-03-16 | Precision Lamp, Inc. | Flat panel display lighting system |
US5485354A (en) * | 1993-09-09 | 1996-01-16 | Precision Lamp, Inc. | Flat panel display lighting system |
US5892325A (en) * | 1993-10-05 | 1999-04-06 | Teledyne Lighting And Display Products, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
US5684354A (en) * | 1993-10-05 | 1997-11-04 | Tir Technologies, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
US6496237B1 (en) | 1993-10-05 | 2002-12-17 | Teledyne Lighting And Display Products, Inc. | Light source utilizing diffusive reflective cavity having two oppositely inclined surfaces |
US6043591A (en) * | 1993-10-05 | 2000-03-28 | Teledyne Lighting And Display Products, Inc. | Light source utilizing diffusive reflective cavity |
US5440197A (en) * | 1993-10-05 | 1995-08-08 | Tir Technologies, Inc. | Backlighting apparatus for uniformly illuminating a display panel |
US6313892B2 (en) | 1993-10-05 | 2001-11-06 | Teledyne Lighting And Display Products, Inc. | Light source utilizing reflective cavity having sloped side surfaces |
US5608550A (en) * | 1994-06-24 | 1997-03-04 | Minnesota Mining And Manufacturing Company | Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector |
US5664862A (en) * | 1994-11-29 | 1997-09-09 | Precision Lamp, Inc. | Edge light for panel display |
US6473554B1 (en) | 1996-12-12 | 2002-10-29 | Teledyne Lighting And Display Products, Inc. | Lighting apparatus having low profile |
US6647199B1 (en) | 1996-12-12 | 2003-11-11 | Teledyne Lighting And Display Products, Inc. | Lighting apparatus having low profile |
US6007209A (en) * | 1997-03-19 | 1999-12-28 | Teledyne Industries, Inc. | Light source for backlighting |
US6151087A (en) * | 1997-06-20 | 2000-11-21 | U.S. Philips Corporation | Liquid crystal display having a light source through an opening of a reflective film covering a side edge of a substrate |
EP0886171A1 (fr) * | 1997-06-20 | 1998-12-23 | Koninklijke Philips Electronics N.V. | Dispositif d'affichage à cristaux liquides et appareil électronique comportant un tel dispositif. |
US6229585B1 (en) * | 1997-10-21 | 2001-05-08 | Rohm Co., Ltd. | Liquid crystal display unit having light on one substrate illuminating edge of other |
US6166787A (en) * | 1998-03-17 | 2000-12-26 | Motorola, Inc. | Optical display device having prismatic film for enhanced viewing |
US6134092A (en) * | 1998-04-08 | 2000-10-17 | Teledyne Lighting And Display Products, Inc. | Illumination device for non-emissive displays |
US6285425B1 (en) | 1998-06-29 | 2001-09-04 | Motorola, Inc. | Ridged reflector for an optical display having a curved and a planar facet for each ridge |
US6285426B1 (en) | 1998-07-06 | 2001-09-04 | Motorola, Inc. | Ridged reflector having optically transmissive properties for an optical display device |
US6456279B1 (en) * | 1998-07-14 | 2002-09-24 | Hitachi, Ltd. | Liquid crystal display device with a touch panel |
US6552852B2 (en) | 2000-12-21 | 2003-04-22 | Zetetic Institute | Catoptric and catadioptric imaging systems |
US20030067565A1 (en) * | 2001-10-05 | 2003-04-10 | Nobuyuki Yamamura | Liquid crystal display |
US7349041B2 (en) * | 2001-10-05 | 2008-03-25 | Samsung Electronics Co., Ltd. | Liquid crystal display with light guiding plate removed from LCD panel and polarizing plate inside LCD panel |
US20100097897A1 (en) * | 2002-11-04 | 2010-04-22 | Tseng-Lu Chien | Time piece with led light means |
US8164984B2 (en) * | 2002-11-04 | 2012-04-24 | Tseng-Lu Chien | Time piece with LED light means |
US20050140835A1 (en) * | 2002-11-29 | 2005-06-30 | Fujitsu Limited | Illuminating device and liquid crystal display apparatus |
US7497609B2 (en) * | 2002-11-29 | 2009-03-03 | Fujitsu Limited | Illuminating device and liquid crystal display apparatus |
US6717736B1 (en) | 2003-02-13 | 2004-04-06 | Zetetic Institute | Catoptric and catadioptric imaging systems |
USD735589S1 (en) * | 2012-02-28 | 2015-08-04 | Movado Llc | Watch case |
Also Published As
Publication number | Publication date |
---|---|
CH615076B5 (nl) | 1980-07-15 |
GB1478931A (en) | 1977-07-06 |
JPS50123295A (nl) | 1975-09-27 |
DE2511252A1 (de) | 1975-09-18 |
CH615076GA3 (nl) | 1980-01-15 |
FR2264344A1 (nl) | 1975-10-10 |
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